Rotary ore-pulverizer



(No Model.) 2 Sheets-Sheet 1.

J. B. GAGNON.

ROTARY ORE PULVERIZER. f No. 299,772. APatentedJune 3, 1884.

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(No Model.) 2 Sheets-Sheet 2.

J. B. GAGNON.

ROTARY ORE PULVERIZER. y No. 299,772. Patented June 3, 1884.

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.TOEN 13. GAG-NON, OFOAKLAND, CALIFORNIA.

ROTARY ORE- PULVERIZER.

SPECIFICATION forming part of Letters Patent No. 299,772, dated June 3, 1884.

' Application filed January 29, 1884. (No model.)

.To all whom it may concern.-

Be it known that I, JOHN B. GAGNON, of Oakland, in the county of Alameda and State of California, have invented certain new and useful Improvements in Rotary Ore-Pulverizers 5 and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to that class of pulverizing-mills in which a grinding-wheel is mounted and driven inside of a rotary case or shell, the rim of which forms a die, so that ore, bones, cement, or other hard substances when fed into the mill through a hollow trunnion will be pulverized and ground between the wheel and die, and at the same time, when sufficiently pulverized, be made to pass through a suitable screen.

In the accompanying drawings, Figure 1 is a plan view of a pulverizer embodying my invention. Fig. 2 is a vertical longitudinal section of the same. Fig. 3 is a transverse section.

A represents the rim of the outer shell or case. One side, B, of this case is solid, while the opposite side is a conical frame with openings O in it, in which openings the screens are placed and secured. .The rim A, I prefer to make quite thick and heavy, so that its interior surface will form the die upon which the grinding takes place; but this is not important, as it might be made thin and light, and a separate die made in parts or sections secured to its inner face, as shown in Fig. 2. The s hell or case I mount upon journals D', surrounding the central shaft, D, which are supported in bearings on a suitable frame, as Vshown in Fig. 3. The shell-j ournals are placed loosely around the shaft D, and the shell has an external gear,

E, formed on or secured to its rim, so that it speed than, the outer case through the gearwheel H on the driving-shaft G anda spurwheel, IzI, on shaft D. To the outside of this ring I bolt or otherwise secure the wearing or grinding shoes J. These shoes can be madeof iron or steel and of any desired weight or size.

I make them tapering or beveled at one end7 like a sled-runner, so that the ore or other substance can get into the openings and be drawn under the shoes as they successively pass around the lower part of the die. These shoes can be removed or replaced when worn by simply taking out.one of the screens and working through the opening which the screen occupied. Arms K K extend radially from the shaft D, one set passing on each side of the ring. I have represented four radial arms on each side of the ring, but a greater or less number can be used, as desired. On each side of the ring I, I provide a shoulder or projection, L, directly in front of each arm K, so that when the shaftD is rotated the arms K will press against the shoulders or projections, and thus drive the ring or cause it to rotate without lifting it from the die upon which it rests. The weight of the ring I and its shoes will then cause it to rest continually on the lower part of the die, andas the varying positions of the ring and the shaft will cause the shoulders or projections L to slide brick and forth over the arms, I shall usually form the shoulders or projections by making short projecting journals and placing a friction-roller, M, on each journal. This will insure the proper adjustment of the wheel, so that its weight will at all times bear upon the ore or other substance on the lower portion of the die, and at Ithe same time these rollers will reduce the wearing on the arms. The pulverizing wheel or ring is kept in an upright position by the two sets of arms, between which it is driven, while its weight, as before stated, is not lifted off the ore on the die.

I proportion the spur-gears H H, gear E, and pinion F so that the outer case or shell will be caused to rotate once while the shaft D and interior pulverizing-ring make ten revy tion of the outer case, with its conical screen, j

causes the ore to be screened and discharged from the mill as fast as it is reduced to a suf- -iicient degree of fineness to pass the meshes of ICO ythe construction described the pulveriz- I arms K, and central shaft, D, substantially as ing-mill is converted into an upright arrastra. in which the weight of the pulvcrizing-wheel is continually pressingr upon and grinding against the ore which lies upon the lower portion of the die, thus insuring speedy and complete pulverization and grinding` of the substance in the mill.

Having thus described my invention, what ll claim, and desire to secure by Letters Patent, 1s

l. In an ore-pulverizer, the outside rotating` case or shell having,` the solid or closed side B, the die A, and conical screen side C, in combination with an independent crushing` and grinding wheel having projections L, the central shaft, D, and arms l, substantially as described.

2. The combination oi' a rotary case or shell, thc crushing and grinding wheel or ring` I, having shoes J and projections L, the radial described.

3. The crushing` and grindingT wheel or ring l', provided with projections L and shoes J, substantially as described.

4. The case or shell provided with an annular die, A, in combination with a loose crushing,` and grinding Wheel, the shaft D, and suitable mechanism l'or rotating said case or shell and grinding-Wheel at different speeds in the same direction, substantially as described.

5. The. case or shell provided with the annular die A, in combination with a loose crushim@r and grinding wheel, I, provided with shoes J, projections L, and friction-rollers M, the radial arms K, and the shaft D, substantially as described.

JOHN B. GAGNON. `\Vitncsscs:

(f). \V. (minus, J. L. Boom. 

